747
FNCA52 TJSJ 300808
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
408 AM AST TUE DEC 30 2025
DISCUSSION
DRIER CONDITIONS WILL PERSIST ACROSS THE REGION; HOWEVER, WINDS
WILL VEER MORE FROM THE EAST-SOUTHEAST LATER TODAY, ALLOWING
POCKETS OF MOISTURE TO MOVE ACROSS THE ISLANDS. THIS INCREASE IN
MOISTURE SHOULD HELP RELATIVE HUMIDITY VALUES REMAIN IN THE UPPER
50S BY EARLY AFTERNOON. SURFACE WINDS WILL SHIFT TO AN EASTERLY
DIRECTION AND INCREASE TO AROUND 15 MPH DURING THE AFTERNOON. KDBI
VALUES CONTINUE TO RISE, WITH THE LAST READINGS NEAR 540 AT CABO
ROJO AND 503 AT CAMP SANTIAGO. GIVEN THE EXPECTED CONDITIONS,
THERE IS A MODERATE RISK OF FIRE DANGER ALONG THE SOUTHERN COASTAL
PLAINS.
PRZ014-310815-
SOUTHEAST COASTAL PLAINS-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 20
TEMP (24H TREND) 84 (+3) 67 (+1) 87
RH % (24H TREND) 45 (-6) 90 (+2) 50
WIND 20FT/EARLY(MPH) SE 12 G17 E 8 SE 11
WIND 20FT/LATE(MPH) SE 12 G17 E 8 SE 11
MIXING HGT(FT-AGL/MSL)4430 3830
TRANSPORT WND (MPH) SE 12 SE 9
VENT RATE (KT-FT) 44300 30640
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-310815-
SOUTHERN HILLS-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 20
TEMP (24H TREND) 82 (+6) 63 (-1) 83
RH % (24H TREND) 56 (-7) 99 (+5) 62
WIND 20FT/EARLY(MPH) SE 10 E 6 SE 10
WIND 20FT/LATE(MPH) SE 10 E 6 SE 10
MIXING HGT(FT-AGL/MSL)4730 4250
TRANSPORT WND (MPH) SE 8 SE 8
VENT RATE (KT-FT) 33110 29750
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-310815-
NORTH COASTAL PLAINS-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 0 10
TEMP (24H TREND) 84 (+4) 66 (0) 86
RH % (24H TREND) 56 (-5) 94 (-3) 60
WIND 20FT/EARLY(MPH) E 11 SE 9 E 11
WIND 20FT/LATE(MPH) E 11 SE 9 E 11
MIXING HGT(FT-AGL/MSL)5080 3830
TRANSPORT WND (MPH) SE 7 E 7
VENT RATE (KT-FT) 30480 22980
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-310815-
NORTHERN HILLS-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 30
TEMP (24H TREND) 83 (+4) 64 (0) 84
RH % (24H TREND) 55 (-5) 94 (-4) 61
WIND 20FT/EARLY(MPH) NE 9 SE 6 NE 8
WIND 20FT/LATE(MPH) NE 9 SE 6 NE 8
MIXING HGT(FT-AGL/MSL)5400 4240
TRANSPORT WND (MPH) S 2 E 3
VENT RATE (KT-FT) 10800 12720
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-310815-
WEST COAST-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 30
TEMP (24H TREND) 84 (+3) 66 (0) 86
RH % (24H TREND) 57 (+1) 95 (+4) 60
WIND 20FT/EARLY(MPH) SE 12 E 12 E 11
WIND 20FT/LATE(MPH) SE 12 E 12 E 11
MIXING HGT(FT-AGL/MSL)4580 3610
TRANSPORT WND (MPH) SE 10 SE 8
VENT RATE (KT-FT) 41220 25270
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-310815-
EASTERN INTERIOR-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 83 (+5) 64 (-1) 85
RH % (24H TREND) 58 (-8) 99 (+1) 62
WIND 20FT/EARLY(MPH) SE 11 SE 8 SE 9
WIND 20FT/LATE(MPH) SE 11 SE 8 SE 9
MIXING HGT(FT-AGL/MSL)4830 4470
TRANSPORT WND (MPH) SE 9 SE 8
VENT RATE (KT-FT) 38640 31290
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-310815-
LUQUILLO MOUNTAIN RANGE-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 78 (+6) 61 (-4) 81
RH % (24H TREND) 63 (-13) 100 (+1) 65
WIND 20FT/EARLY(MPH) SE 10 SE 6 SE 8
WIND 20FT/LATE(MPH) SE 10 SE 6 SE 8
MIXING HGT(FT-AGL/MSL)4650 3580
TRANSPORT WND (MPH) SE 12 SE 8
VENT RATE (KT-FT) 46500 25060
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-310815-
CENTRAL MOUNTAIN RANGE-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 81 (+7) 61 (-1) 83
RH % (24H TREND) 55 (-10) 98 (-1) 61
WIND 20FT/EARLY(MPH) SE 8 SE 6 SE 6
WIND 20FT/LATE(MPH) SE 8 SE 6 SE 6
MIXING HGT(FT-AGL/MSL)5540 5130
TRANSPORT WND (MPH) S 3 SE 5
VENT RATE (KT-FT) 16620 20520
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-310815-
CAYEY MOUNTAIN RANGE-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 78 (+5) 62 (-1) 80
RH % (24H TREND) 62 (-9) 100 (0) 67
WIND 20FT/EARLY(MPH) SE 9 E 5 SE 8
WIND 20FT/LATE(MPH) SE 9 E 5 SE 8
MIXING HGT(FT-AGL/MSL)4590 3810
TRANSPORT WND (MPH) SE 12 SE 8
VENT RATE (KT-FT) 45900 26670
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-310815-
VIEQUES-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 82 (+2) 68 (-3) 86
RH % (24H TREND) 53 (-10) 99 (+13) 57
WIND 20FT/EARLY(MPH) SE 11 E 9 SE 9
WIND 20FT/LATE(MPH) SE 11 E 9 SE 9
MIXING HGT(FT-AGL/MSL)5070 3730
TRANSPORT WND (MPH) E 12 SE 12
VENT RATE (KT-FT) 50700 37300
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-310815-
CULEBRA-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 83 (+3) 70 (-3) 86
RH % (24H TREND) 55 (-10) 95 (+9) 57
WIND 20FT/EARLY(MPH) SE 12 SE 10 SE 9
WIND 20FT/LATE(MPH) SE 12 SE 10 SE 9
MIXING HGT(FT-AGL/MSL)5140 3820
TRANSPORT WND (MPH) E 12 SE 13
VENT RATE (KT-FT) 51400 42020
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-310815-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 30
TEMP (24H TREND) 84 (+2) 67 (-1) 87
RH % (24H TREND) 46 (-2) 89 (+5) 52
WIND 20FT/EARLY(MPH) SE 16 G20 E 14 G18 SE 17 G22
WIND 20FT/LATE(MPH) SE 16 G20 E 14 G18 SE 17 G22
MIXING HGT(FT-AGL/MSL)4530 3760
TRANSPORT WND (MPH) SE 14 SE 15
VENT RATE (KT-FT) 54360 48880
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-310815-
SAINT THOMAS AND SAINT JOHN-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
TEMP (24H TREND) 83 (+4) 69 (-4) 84
RH % (24H TREND) 56 (-10) 96 (+11) 60
WIND 20FT/EARLY(MPH) SE 10 SE 10 SE 10
WIND 20FT/LATE(MPH) SE 10 SE 10 SE 10
MIXING HGT(FT-AGL/MSL)5330 3910
TRANSPORT WND (MPH) E 12 SE 12
VENT RATE (KT-FT) 53300 39100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-310815-
ST CROIX-
408 AM AST TUE DEC 30 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 10
TEMP (24H TREND) 82 (+2) 69 (-4) 84
RH % (24H TREND) 57 (-6) 96 (+18) 61
WIND 20FT/EARLY(MPH) SE 11 E 10 E 11
WIND 20FT/LATE(MPH) SE 11 E 10 E 11
MIXING HGT(FT-AGL/MSL)4600 4090
TRANSPORT WND (MPH) SE 13 SE 12
VENT RATE (KT-FT) 50600 40900
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page